CN108020466A - For the split type miniature extensometer of small-sized original position stretching instrument stretcher strain measurement - Google Patents
For the split type miniature extensometer of small-sized original position stretching instrument stretcher strain measurement Download PDFInfo
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- CN108020466A CN108020466A CN201711390004.5A CN201711390004A CN108020466A CN 108020466 A CN108020466 A CN 108020466A CN 201711390004 A CN201711390004 A CN 201711390004A CN 108020466 A CN108020466 A CN 108020466A
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- extensometer
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- 238000005259 measurement Methods 0.000 title claims abstract description 39
- 238000006073 displacement reaction Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 14
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 abstract description 7
- 238000003384 imaging method Methods 0.000 abstract description 5
- 238000009864 tensile test Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The present invention relates to a kind of split type miniature extensometer for small-sized original position stretching instrument stretcher strain measurement, belong to sophisticated sensor and precision instrument technical field.Geometrical clamp is close to sample side, and fastening clip is connected by shaft with geometrical clamp, is provided with the fastening clip clamping sample of blade, and is tightened by rubber band and geometrical clamp, and capacitance displacement sensor and measurement plate fixed frame are connected by screw with geometrical clamp respectively.The extremely compact micro tensile specimen that can be suitable for 8 20mm of gauge length segment length of whole extensometer size is made using small sensing element, the gauge length section of sample is not blocked using split structure, does not influence in experimentation to the in situ imaging of sample.Advantage is：Compact-sized, small, precision is high, the deformation measurement especially suitable for the material micro mechanical property in-situ tensile test under scanning electron microscope.
Description
Technical field
The present invention relates to sophisticated sensor and precision instrument technical field, more particularly to materials mechanics experimental device technique is led
Domain, espespecially a kind of split type miniature extensometer for small-sized original position stretching instrument stretcher strain measurement.
Background technology
With the raising of material science research level, material property testing machine is just towards miniaturization, microcosmicization development.One system
Row material in situ micro mechanical property test instrument comes into being.This quasi-instrument is gone to obtain the microdeformation of material with failure
For micro-image, often integrated with imaging devices such as scanning electron microscope, thus instrument takes the design of miniaturization, it is tried
Sample ruler cun is also much smaller than traditional Mechanics Performance Testing sample.Due to the limitation in space, traditional conventional extensometer also can not be with
Instrument integration.This kind of material property in-situ test instrument usually measures the displacement between two fixtures to replace using LVDT sensors
The deformation values of sample, there are larger error, can not obtain accurate material tensile stress-strain curve.
The content of the invention
It is an object of the invention to provide a kind of split type mini for small-sized original position stretching instrument stretcher strain measurement
Meter is stretched, solving extensometer existing in the prior art can not integrate with small-sized original position stretching instrument and obtain asking for material tensile deformation
Topic.The present invention makes whole extensometer size is extremely compact can be suitable for gauge length segment length 8-20mm using small sensing element
Micro tensile specimen, do not block the gauge length section of sample using split structure, do not influence in experimentation to the original position of sample
Imaging.With it is compact-sized, small, for microspecimen and can adapt to sizes, not block imaging optical path, precision high
The features such as, the deformation measurement especially suitable for the material micro mechanical property in-situ tensile test under scanning electron microscope.
The above-mentioned purpose of the present invention is achieved through the following technical solutions：
For the split type miniature extensometer of small-sized original position stretching instrument stretcher strain measurement, geometrical clamp 3 abuts the side of sample 9,
Fastening clip 1 is connected by shaft 8 with geometrical clamp 3, is provided with 1 clamping sample 9 of fastening clip of blade 2, and by rubber band 4 and admittedly
Clamp 3 tightens, and capacitance displacement sensor 5 and measurement plate fixed frame 6 are connected by screw with geometrical clamp 3 respectively.
The measurement plate fixed frame 6 is connected by pair of nut with spiral measurement plate 7, is turned spiral measurement plate 7 and is adjusted it
With the relative distance between capacitance displacement sensor 5；By between capacitance displacement sensor 5 and spiral measurement plate 7 it is opposite away from
From deformation of the acquisition sample 9 in gauge length section.
The fastening clip 1, blade 2, the material of geometrical clamp 3 are 304 stainless steels.
The beneficial effects of the present invention are：Compact-sized, size is small, and it is the micro- of 8-20mm that can be suitable for gauge length segment length
Type tensile sample.The maximum of deformation measurement disclosure satisfy that most of original position stretching sample for the 6.5% of whole gauge length segment length
It is required that.The deformation values of test are the deformation of sample in gauge length segment limit between two clamping mechanisms, compared to traditional original position stretching
Instrument utilizes LVDT sensor measured material displacements and then the indirect mode for obtaining sample deformation, test method proposed by the invention
It is more accurate, direct.
Brief description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright illustrative example and its explanation is used to explain the present invention, does not form inappropriate limitation of the present invention.
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the schematic diagram of the sample clamping mechanism of the present invention；
Fig. 3 is the schematic diagram of the deformation measurement method of the present invention.
In figure：1st, fastening clip；2nd, blade；3rd, geometrical clamp；4th, rubber band；5th, capacitance displacement sensor；6th, measurement plate is fixed
Frame；7th, spiral measurement plate；8th, shaft；9th, sample；10th, vernier caliper.
Embodiment
The detailed content and its embodiment of the present invention is further illustrated below in conjunction with the accompanying drawings.
Referring to shown in Fig. 1 to Fig. 3, the split type mini for small-sized original position stretching instrument stretcher strain measurement of the invention
Stretch meter, including fastening clip 1, blade 2, geometrical clamp 3, rubber band 4, capacitance displacement sensor 5, measurement plate fixed frame 6, spiral measurement
Plate 7 and shaft 8, the geometrical clamp 3 are close to 9 side of sample, ensure the installation verticality of extensometer and sample 9, are provided with blade 2
1 clamping sample 9 of fastening clip, geometrical clamp 3 is rotatablely connected by shaft 8 and fastening clip 1.Rubber band 4 is by the thin bar on geometrical clamp 3
Tightened with the thin bar on fastening clip 1, the tension force that rubber band 4 provides makes blade 2 tightly be blocked with sample 9, prevents between sample 9
Play.The fastening clip 1, blade 2, geometrical clamp 3 are 304 stainless steels.
Shown in Figure 1, capacitance displacement sensor 5 and measurement plate fixed frame 6 pass through screw and corresponding geometrical clamp 3 respectively
Connection, two geometrical clamps 3 can adapt to different specimen sizes according to 9 size adjusting of sample.6 center of measurement plate fixed frame processes
There is threaded hole, screwed with the external screw thread in spiral measurement plate 7.5 displacement measurement resolution of capacitance displacement sensor is 0.38nm, amount
Journey 0.5mm.Utilize the output voltage signal of data collecting card collection sensor.Sensor will ensure it in range in use
Work, therefore turn spiral measurement plate 7 before experiment starts and adjust its relative distance between capacitance displacement sensor 5, lead to
The reading of capture card collection is crossed, makes its relative distance as far as possible close.Pass through capacitance displacement sensor in measurement experiment 5 and spiral survey
Relative distance between template 7 obtains the deformation in gauge length section of sample 9.
Extensometer of the present invention uses split structure, capacitance displacement sensor and spiral measurement plate to be filled using respective clamping
Put and be fixed on sample, turn spiral measurement plate, adjust its initial distance with capacitance displacement sensor, it is ensured that sensor is being measured
Journey operated within range.Gather the deformation values of the distance between capacitance displacement sensor and spiral measurement plate as sample.Using micro-
Small sensing element makes whole extensometer size extremely compact, can be tried suitable for the microtensile of gauge length segment length 8-20mm
Sample, does not block the gauge length section of sample using split structure, does not influence in experimentation to the in situ imaging of sample.With structure
It is compact, small, the features such as precision is high, especially suitable for the material micro mechanical property in-situ tensile test under scanning electron microscope
Deformation measurement.
It is shown in Figure 3, after the installation and adjusting of completing this extensometer, before experiment starts, utilize vernier caliper 10
Or inside micrometer, measurement the distance between two fastening clips, to determine the exact length L of gauge length section, and to sensor values into
Row is reset.Experiment gathers the reading of capacitance displacement sensor 5 after starting, as the deflection Δ L of sample marking distance section, experimentation
Elongation strain value ε=Δ L/L of middle sample 9.Extensometer integrally uses split structure, and size is minimum, does not block sample marking distance
Section.
The foregoing is merely the preferred embodiment of the present invention, it is not intended to limit the invention, for the technology of this area
For personnel, the invention may be variously modified and varied.All any modification, equivalent substitution, improvement and etc. made for the present invention,
It should all be included in the protection scope of the present invention.
Claims (3)
- A kind of 1. split type miniature extensometer for small-sized original position stretching instrument stretcher strain measurement, it is characterised in that：Geometrical clamp （3）Against sample（9）Side, fastening clip（1）Pass through shaft（8）With geometrical clamp（3）Connection, is provided with blade（2）Clamping Folder（1）Clamping sample（9）, and pass through rubber band（4）With geometrical clamp（3）Tighten, capacitance displacement sensor（5）Fixed with measurement plate Frame（6）Pass through screw and geometrical clamp respectively（3）Connection.
- 2. the split type miniature extensometer according to claim 1 for small-sized original position stretching instrument stretcher strain measurement, its It is characterized in that：The measurement plate fixed frame（6）Pass through pair of nut and spiral measurement plate（7）Connection, turns spiral measurement plate（7） Adjust itself and capacitance displacement sensor（5）Between relative distance；Pass through capacitance displacement sensor（5）With spiral measurement plate（7） Between relative distance obtain sample（9）Deformation in gauge length section.
- 3. the split type miniature extensometer according to claim 1 for small-sized original position stretching instrument stretcher strain measurement, its It is characterized in that：The fastening clip（1）, blade（2）, geometrical clamp（3）Material be 304 stainless steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711390004.5A CN108020466B (en) | 2017-12-21 | 2017-12-21 | Split type miniature extensometer for measuring stretching deformation of small-sized in-situ stretching instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711390004.5A CN108020466B (en) | 2017-12-21 | 2017-12-21 | Split type miniature extensometer for measuring stretching deformation of small-sized in-situ stretching instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108020466A true CN108020466A (en) | 2018-05-11 |
| CN108020466B CN108020466B (en) | 2024-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711390004.5A Active CN108020466B (en) | 2017-12-21 | 2017-12-21 | Split type miniature extensometer for measuring stretching deformation of small-sized in-situ stretching instrument |
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| Country | Link |
|---|---|
| CN (1) | CN108020466B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941996A (en) * | 2022-07-26 | 2022-08-26 | 西北工业大学 | Fiber grating strain measurement system for round bar fatigue sample |
Citations (14)
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|---|---|---|---|---|
| US4251918A (en) * | 1979-12-03 | 1981-02-24 | Duggan Michael F | Extensometer |
| CN2148958Y (en) * | 1992-07-30 | 1993-12-08 | 机电部长春试验机研究所 | Large gage length extender |
| US5712430A (en) * | 1996-10-16 | 1998-01-27 | Mts Systems Corporation | Extensometer structure |
| CN2635304Y (en) * | 2003-07-15 | 2004-08-25 | 纪宁 | Carpenter square hole drilling device |
| KR101170144B1 (en) * | 2011-11-29 | 2012-07-31 | 대경테크 주식회사 | Test piece clamping device of extensometer |
| CN202994600U (en) * | 2012-12-13 | 2013-06-12 | 武钢集团昆明钢铁股份有限公司 | Extensometer for griping samples of different specifications |
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| US5712430A (en) * | 1996-10-16 | 1998-01-27 | Mts Systems Corporation | Extensometer structure |
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| CN203163675U (en) * | 2013-01-15 | 2013-08-28 | 深圳万测试验设备有限公司 | Resistor strain type extensometer |
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| CN106018078A (en) * | 2016-07-21 | 2016-10-12 | 南京工业大学 | Displacement extension clamping device for measuring axial tensile deformation of steel cable at high temperature and using method of displacement extension clamping device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941996A (en) * | 2022-07-26 | 2022-08-26 | 西北工业大学 | Fiber grating strain measurement system for round bar fatigue sample |
| CN114941996B (en) * | 2022-07-26 | 2022-11-01 | 西北工业大学 | Fiber grating strain measurement system for round bar fatigue sample |
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| Publication number | Publication date |
|---|---|
| CN108020466B (en) | 2024-02-02 |
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